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| NAS - Nonindigenous Aquatic Species |
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Common Name: a freshwater crab
Taxonomy: available through 
Identification: Geothelpusa dahaani is actually a species complex comprised of 2-3 species.
Native Range:
Japan.
Nonindigenous Occurrences: Several small crabs (about 1 inch across the carapace) were found at a Hyatt Hotel along the shore of Lake Las Vegas, a freshwater, artificial lake in the Las Vegas area, on two separate occasions in 2000. The first sighting, around March, included about a dozen crabs. All those collected at that time were females. The second sighting, around June, was of 2 males and 2 females. No females with eggs were found.
Means of Introduction: Although it was intially speculated that their introduction was likely the result of an aquarium release, their release has been traced to a sushi bar (A. Cook, pers. comm.).
Status: No more crabs have been collected since the initial find.
Impact of Introduction:
Remarks:
Although these were identified by Dr. Neil Cumberlidge, Northern Michigan University, Peter ng kee lin, a crab expert in Singapore, reports that G. dahaani is actually a species complex comprised of 2-3 species.
References
Author: Pam Fuller
Revision Date: 8/28/2006 Citation for this information:
Pam Fuller. 2009. Geothelphusa dehaani. USGS Nonindigenous Aquatic Species Database, Gainesville, FL.
<http://nas.er.usgs.gov/queries/FactSheet.asp?speciesID=193> Revision Date: 8/28/2006
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